Question about Aqua Plus SWG logic

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ronkmd

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Mar 26, 2021
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Hi. I have a Hayward Aqua Plus system with SWG, installed around 2012. Unfortunately, several local "pool professionals" have not done right by me and my system, so I've completely taken over. I'm on my 4th Salt Cell and my 3rd circuit board. Also, my Hayward Intelliflo pump's controller died, so I replaced the pump with a Century Vgreen 270. I have the Aqua Plus monitored and controlled through Home Assistant via an RS485 to Wifi adapter and the Vgreen is monitored and controlled through Home Assistant via ESPHome. Since the Aqua Plus is not directly communicating with the Vgreen pump (since they don't speak the same RS485 "language"), I basically have the Aqua Plus set up to have the Filter relay turned on 24/7 to provide power to the Vgreen however/whenever I decide to run it. So, the Aqua Plus is unaware of when or what speed the Vgreen is running at, if at all (except for maybe via the Flow Sensor).

So, after all that, my question is: How does the Aqua Plus know when to turn the SWG on or off? Will it claim "Chlorinator Off, Percentage Met", thinking the pump has run from midnight to 1000, when the Vgreen doesn't even start till 1000, just because the Filter Relay has been ON since midnight but with no Flow? Or will it only turn on the SWG when there is Filter Relay=ON AND Flow Sensor=FLOW, and then start calculating Percent Generated? Is there a better way for me to be managing the system I have?

Sorry it's kind of convoluted and I hope I've explained the situation adequately. Thanks in advance for any insights.
 
First, your Aquaplus will power the SWG cell anytime the filter pump relay is ON and the flow switch is CLOSED.

The flow switch is intended to be a secondary safety device. When your flow switch fails, and they all do eventually, it may fail closed, in which case your cell will be powered with no flow. That will confuse your salinity readings and may generate hydrogen gas. Without water flow the hydrogen gas can accumulate in the cell and explode. Yes, we have a bunch of threads of pool equipment pad explosions from SWGs.

Second, "Chlorinator Off, Percentage Met" is based on the SWG cycle time, which for the Aquarite cells is 180 minutes. Read SWG Generation Cycle Times - Further Reading

How to better manage the system is difficult given the mutt you have cobbled together.

Connect the VGreen motor to constant power and set the Aquaplus filter pump schedule to the same as in the VGreen controls.
 
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